I think you interpreted that wrong. Less refusals than "previous generations of models" presumably means that is has less refusals than _their_ previous genera

I think you interpreted that wrong. Less refusals than "previous generations of models" presumably means that is has less refusals than _their_ previous generations of models (= Claude 2), which was notorious for being the worst in class when it came to refusals. I wouldn't be surprised if it's still less permissive than GPT-4.